from rest_framework import serializersfrom .models import Area"""在查询所有省时用的是AreaSerializer在查询单一省时 SubsSerializer代表单个省  --->AreaSerializer 省下面的所有市在查询单一市时 SubsSerializer代表单个市  --->AreaSerializer 市下面的所有区"""class AreaSerializer(serializers.ModelSerializer):    """省的序列化器?"""    class Meta:        model = Area        fields = ['id', 'name']class SubsSerializer(serializers.ModelSerializer):    # 130000    # 河北省模型.subs.all()    """详情视图使用的序列化器"""    subs = AreaSerializer(many=True)    # subs = serializers.PrimaryKeyRelatedField()  # 只会序列化出 id    # subs = serializers.StringRelatedField()  # 序列化的时模型中str方法返回值    class Meta:        model = Area        fields = ['id', 'name', 'subs']